To my pleasant surprise Audacity scales well on KDE Neon 5.16. On other distro's on the same hardware it does not, e.g. Kubuntu, Ubuntu, Fedora, Mint. There some number boxes are very small, other boxes have half the height they should have, and so on.
Since KDE Neon focuses on KDE and not on applications I wonder did the developers do something to get this well behaved HiDPI scaling (3840 * 2160, factor 2)? And if they did anything, what was it, maybe I can apply this (although I am not a developer) in Kubuntu?

Thanks